Three things are told us in Scripture concerning the nature of God. First, “God is a Spirit” (John 4:24). In the Greek, there is no indefinite article. To say God is “a” spirit is most objectionable, for it places Him in a class with others. God is spirit in the highest sense. Because He is spirit, He is incorporeal, [that is,] having no visible substance. Had God a tangible body, He would not be omnipresent, He would be limited to one place; because He is spirit, He fills heaven and earth.
Second, “God is light” (1 John 1:5), the opposite of darkness. In Scripture, “darkness” stands for sin, evil, death, and “light” for holiness, goodness, life. “God is light” means that He is the sum of all excellency. Third, “God is love” (1 John 4:8). It is not simply that God loves, but that He is love itself. Love is not merely one of His attributes, but His very nature.
There are many who talk about the love of God, who are total strangers to the God of love. The divine love is commonly regarded as a species of amiable weakness, a sort of good-natured indulgence. It is reduced to a mere sickly sentiment, patterned after human emotion. The truth is that on this, as on everything else, our thoughts need to be formed and regulated by what is revealed in Scripture. That there is urgent need for this is apparent not only from the ignorance that so generally prevails, but also from the low state of spirituality that is now so sadly evident everywhere among professing Christians. How little real love there is for God! One chief reason for this is because our hearts are so little occupied with His wondrous love for His people. The better we are acquainted with His love — its character, fullness, blessedness—the more our hearts will be drawn out in love to Him.